Hash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from any text.
About Hash Generator
This free online hash generator computes MD5, SHA-1, SHA-256, and SHA-512 hashes from any text input in real time. SHA hashes are generated using the Web Crypto API built into your browser, while MD5 is computed using a pure JavaScript implementation. All processing happens locally — no data is ever sent to a server.
How to Use
- Type or paste your text into the input area. Hashes are generated automatically as you type.
- All four hash algorithms (MD5, SHA-1, SHA-256, SHA-512) are computed simultaneously.
- Toggle Uppercase output to switch between lowercase and uppercase hex representation.
- Click Copy next to any hash to copy it to your clipboard.
Frequently Asked Questions
What is a hash function?
A hash function takes an input (or “message”) and returns a fixed-size string of bytes. The output (the “hash” or “digest”) is deterministic — the same input always produces the same output — but it is practically impossible to reverse the process and recover the original input from the hash.
Which hash algorithm should I use?
For security-sensitive applications, use SHA-256 or SHA-512. MD5 and SHA-1 are considered cryptographically broken and should only be used for checksums or non-security purposes like data integrity verification.
Is MD5 still safe to use?
MD5 is no longer considered secure for cryptographic purposes due to known collision vulnerabilities. However, it is still commonly used for non-security checksums, file integrity checks, and legacy system compatibility.
How is this tool implemented?
SHA-1, SHA-256, and SHA-512 are computed using the Web Crypto API (SubtleCrypto.digest), which is a native browser API. MD5 is implemented as a pure JavaScript function since the Web Crypto API does not support MD5.
Is my data sent to any server?
No. All hash computations happen entirely in your browser. Your input text is never transmitted over the network.